[b] Fix: Stripe subscription trial will end webhook event with Connect

[donnguyen]

Pull Request

Summary:
To fix an issue where subscription.sync! doesn't pass in stripe_account params if Connect.

Checklist:

• Code follows the project's coding standards
• Tests have been added or updated to cover the changes
• Documentation has been updated (if applicable)
• All existing tests pass
• Conforms to the contributing guidelines

Additional Notes:

[excid3]

Thanks @donnguyen 👍